** date ** baggeren ** storten ** zandwinning ** wrak ** to01/01/1955 NaN 01/01/1955 NaN 31/12/1955 NaN 31/12/1956 NaN 31/12/1957 NaN 31/12/1958 NaN 31/12/1959 NaN 31/12/1960 NaN 31/12/1961 -1.314655E+005 31/12/1962 NaN 31/12/1963 NaN 31/12/1964 NaN 31/12/1965 NaN 31/12/1966 NaN 31/12/1967 NaN 31/12/1968 NaN 31/12/1969 -1.308636E+004 31/12/1970 -3.778850E+003 31/12/1971 -8.261254E+003 31/12/1972 -1.141410E+004 31/12/1973 -4.607433E+002 31/12/1974 -1.288650E+004 31/12/1975 -8.125890E+005 31/12/1976 -7.615923E+002 31/12/1977 -1.070960E+005 31/12/1978 -2.846285E+005 31/12/1979 -2.026617E+005 31/12/1980 -2.918422E+005 31/12/1981 NaN 31/12/1982 -2.821204E+006 31/12/1983 -3.173413E+005 31/12/1984 NaN 31/12/1985 -3.633702E+005 31/12/1986 -3.565000E+005 31/12/1987 -1.311080E+005 31/12/1988 NaN 31/12/1989 NaN 31/12/1990 -5.433349E+005 31/12/1991 -4.413496E+005 31/12/1992 -2.706906E+005 31/12/1993 -3.048392E+005 31/12/1994 -9.904363E+005 31/12/1995 -1.587076E+006 31/12/1996 -1.108308E+006 31/12/1997 -3.381283E+005 31/12/1998 -1.795354E+006 31/12/1999 -2.773274E+006 31/12/2000 -1.101226E+006 31/12/2001 -1.506948E+006 31/12/2002 -1.028287E+006 31/12/2003 -9.288177E+005 31/12/2004 -5.024271E+005 31/12/2005 -9.463491E+005 31/12/2006 -2.142855E+005 31/12/2007 NaN NaN 1.222574E+006 1.781294E+007 31/12/1966 NaN 8.568520E+005 -1.878612E+004 NaN 8.380659E+005 1.865101E+007 31/12/1967 NaN 1.765370E+006 -1.279257E+006 NaN 4.861129E+005 1.913712E+007 31/12/1968 NaN 1.252805E+006 -7.975028E+005 NaN 4.553020E+005 1.959242E+007 31/12/1969 -1.308636E+004 3.234712E+006 -9.574543E+005 NaN 2.264171E+006 2.185659E+007 31/12/1970 -3.778850E+003 3.052804E+006 -7.493527E+005 NaN 2.299673E+006 2.415627E+007 31/12/1971 -8.261254E+003 4.447722E+006 -1.313661E+006 NaN 3.125800E+006 2.728207E+007 31/12/1972 -1.141410E+004 4.324054E+006 -1.878729E+005 NaN 4.124767E+006 3.140683E+007 31/12/1973 -4.607433E+002 5.386937E+006 -9.142350E+005 NaN 4.472241E+006 3.587907E+007 31/12/1974 -1.288650E+004 6.751091E+006 -1.090779E+005 NaN 6.629126E+006 4.250820E+007 31/12/1975 -8.125890E+005 6.627069E+006 -2.547354E+005 NaN 5.559744E+006 4.806794E+007 31/12/1976 -7.615923E+002 6.449446E+006 -9.947732E+004 NaN 6.349207E+006 5.441715E+007 31/12/1977 -1.070960E+005 4.049423E+006 -5.542864E+005 NaN 3.388041E+006 5.780519E+007 31/12/1978 -2.846285E+005 6.225523E+006 -1.206812E+006 NaN 4.734083E+006 6.253928E+007 31/12/1979 -2.026617E+005 6.297112E+006 -7.865406E+004 NaN 6.015796E+006 6.855507E+007 31/12/1980 -2.918422E+005 4.790184E+006 -5.628373E+005 NaN 3.935504E+006 7.249058E+007 31/12/1981 NaN 3.210261E+006 -9.948938E+004 NaN 3.110772E+006 7.560135E+007 31/12/1982 -2.821204E+006 4.728769E+006 -7.305250E+004 NaN 1.834512E+006 7.743586E+007 31/12/1983 -3.173413E+005 4.137365E+006 -1.467242E+006 NaN 2.352782E+006 7.978864E+007 31/12/1984 NaN 3.953257E+006 -1.999564E+006 NaN 1.953692E+006 8.174234E+007 31/12/1985 -3.633702E+005 5.238439E+006 -1.152494E+005 NaN 4.759820E+006 8.650215E+007 31/12/1986 -3.565000E+005 3.779572E+006 -1.790972E+006 NaN 1.632100E+006 8.813426E+007 31/12/1987 -1.311080E+005 4.562038E+006 -3.311362E+005 NaN 4.099794E+006 9.223405E+007 31/12/1988 NaN 5.678919E+006 -6.902915E+005 NaN 4.988628E+006 9.722268E+007 31/12/1989 NaN 4.268545E+006 -1.189679E+006 NaN 3.078865E+006 1.003015E+008 31/12/1990 -5.433349E+005 3.685015E+006 -5.533600E+005 NaN 2.588320E+006 1.028899E+008 31/12/1991 -4.413496E+005 4.426365E+006 -6.046631E+005 NaN 3.380352E+006 1.062702E+008 31/12/1992 -2.706906E+005 4.213798E+006 -8.575200E+005 NaN 3.085587E+006 1.093558E+008 31/12/1993 -3.048392E+005 2.963876E+006 -1.158242E+006 NaN 1.500795E+006 1.108566E+008 31/12/1994 -9.904363E+005 4.452448E+006 -1.049575E+006 NaN 2.412437E+006 1.132690E+008 31/12/1995 -1.587076E+006 5.416791E+006 -8.408509E+005 NaN 2.988864E+006 1.162579E+008 31/12/1996 -1.108308E+006 6.162188E+006 -5.645169E+005 NaN 4.489363E+006 1.207473E+008 31/12/1997 -3.381283E+005 7.069071E+006 -6.750263E+005 NaN 6.055916E+006 1.268032E+008 31/12/1998 -1.795354E+006 1.071296E+007 -9.944370E+005 NaN 7.923171E+006 1.347263E+008 31/12/1999 -2.773274E+006 9.141807E+006 -1.531519E+006 2.275164E+005 5.064530E+006 1.397909E+008 31/12/2000 -1.101226E+006 5.913142E+006 -1.747732E+006 NaN 3.064183E+006 1.428551E+008 31/12/2001 -1.506948E+006 6.254066E+006 -1.130343E+006 NaN 3.616776E+006 1.464718E+008 31/12/2002 -1.028287E+006 5.065656E+006 -7.112290E+005 NaN 3.326140E+006 1.497980E+008 31/12/2003 -9.288177E+005 6.100016E+006 -7.220169E+005 2.026436E+005 4.651825E+006 1.544498E+008 31/12/2004 -5.024271E+005 5.594977E+006 -8.682245E+005 NaN 4.224326E+006 1.586741E+008 31/12/2005 -9.463491E+005 4.886409E+006 -8.602882E+005 NaN 3.079772E+006 1.617539E+008 31/12/2006 -2.142855E+005 3.677557E+006 -8.725900E+005 NaN 2.590682E+006 1.643446E+008 31/12/2007 NaN NaN -7.912018E+005 NaN -7.912018E+005 1.635534E+008